This is a very quick (read: low production value) video showing a focusing technique for the X-Pro 1 when using the EVF for manual focusing.
Using the EVF on the X-Pro 1 you can use the tendency of the EVF to show aliasing on curved and diagonal lines as well as moire on patterns to act as a kind of focus peaking. It would be nice if Fujifilm adds focus peaking on a future firmware update (after all sony did it) but until then this little technique works like a charm. Please note that this aliasing and moire don't show up in the image they are natural consequences of the resolution in the electronic viewfinder. The aliasing and moire can also be seen and used on the LCD on the back of the camera when manually focusing.